Medullation
髓形成, 髓鞘形成
🗣️ 情景例句
He told me
他告诉我
All of us hope that you will enjoy yourselves.
我们全体人员祝大家过得愉快。
Mr. Green doesn't climb down the chimney. He waits until the children are asleep.
格林先生不从烟囱上爬下来，他等候孩子们都睡熟。